Acetyl-PHF6 amidea is a tau derived hexapeptide.
CAT No: R1147
Acetyl-PHF6 amide TFA is a synthetic peptide fragment derived from the microtubule-associated protein tau, specifically encompassing the hexapeptide motif (PHF6: VQIVYK) that is critically implicated in tau aggregation processes. As a chemically defined tau peptide, it is widely recognized for its capacity to recapitulate the core aggregation-driving sequence found in paired helical filaments (PHFs) associated with neurodegenerative tauopathies. The addition of an N-terminal acetyl group and the C-terminal amide modification confer enhanced stability and mimic the post-translational modifications observed in native tau protein, while the trifluoroacetate (TFA) salt form facilitates solubility and handling in laboratory settings. Acetyl-PHF6 amide TFA is an indispensable tool for researchers investigating the molecular mechanisms of tau aggregation, amyloid formation, and protein misfolding phenomena in neurobiology.
Aggregation studies: The PHF6 motif is central to tau self-assembly, and its acetylated, amidated synthetic version enables precise in vitro modeling of tau aggregation kinetics and fibril formation. Researchers utilize this peptide to induce and monitor the nucleation and elongation phases of amyloid fibril development, providing mechanistic insights into the molecular determinants of tauopathy pathogenesis. By serving as a minimal core sequence, the peptide supports controlled experiments that dissect the contributions of specific sequence elements and post-translational modifications to aggregation propensity.
Structure-function analysis: Acetyl-PHF6 amide TFA is extensively employed in structural biology for elucidating the conformational transitions that underlie tau filament assembly. It is amenable to a range of biophysical techniques, including nuclear magnetic resonance (NMR), X-ray crystallography, and cryo-electron microscopy, to resolve atomic-level details of fibril architecture. These studies are fundamental for understanding the intermolecular interactions and β-sheet arrangements that drive pathogenic aggregation, and for comparing the effects of sequence modifications or small-molecule modulators on peptide structure.
Screening of aggregation inhibitors: The defined aggregation-prone nature of the PHF6 peptide makes it a valuable substrate for high-throughput screening assays aimed at identifying small molecules, peptides, or antibodies that can modulate or inhibit tau aggregation. Utilizing this model system, researchers can rapidly evaluate the efficacy and mechanism of candidate aggregation inhibitors, facilitating the development of novel chemical probes or potential therapeutic leads for tauopathies. The peptide's robust and reproducible aggregation behavior ensures reliable assay performance in both kinetic and endpoint formats.
Seeding assays: Due to its strong self-assembly properties, acetylated PHF6 amide is frequently used as a seed in experiments designed to initiate or accelerate tau aggregation in vitro. By introducing preformed fibrils or oligomers into tau solutions, scientists can study the templated conversion of monomeric tau into amyloid structures, thereby modeling the prion-like propagation mechanisms observed in tauopathies. These assays are instrumental for dissecting the factors that influence seeding efficiency, strain specificity, and cross-seeding barriers between tau isoforms or related proteins.
Biomaterials and nanotechnology research: Beyond its role in neurodegeneration studies, the robust self-assembling characteristics of the PHF6 peptide sequence have attracted interest in the design of peptide-based nanomaterials. Researchers leverage its predictable β-sheet aggregation to engineer functionalized nanofibers, hydrogels, or scaffolds for various biotechnological applications. The ability to control assembly through sequence modifications and environmental conditions enables the creation of novel biomaterials with tunable mechanical and biochemical properties, expanding the utility of this peptide motif into material science domains.
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